Rural Valley folio, Pennsylvania /
Butts, Charles,1863-1946.
Geological Survey (U.S.)
Washington, D.C. : The Survey,
1905.
Relief shown by contours and spot heights.
Cover title.
Plates: [1] Topography -- [2] Areal geology -- [3] Structure and economic geology -- [4] Well sections -- [5] Coal sections -- [6] Illustrations.
Location map on cover.
Text and ill. on inside covers.
List of folios on back cover.
Geology
Geology